| 著者 |
Ogishi M, Kitaoka K, Good-Jacobson KL, Rinchai D, Zhang B, Wang J, Gies V, Rao G, Nguyen T, Avery DT, Khan T, Smithmyer ME, Mackie J, Yang R, Arias AA, Asano T, Ponsin K, Chaldebas M, Zhang P, Peel JN, Bohlen J, Lévy R, Pelham SJ, Lei WT, Han JE, Fagniez I, Chrabieh M, Laine C, Langlais D, Gruber C, Al Ali F, Rahman M, Aytekin C, Benson B, Dufort MJ, Domingo-Vila C, Moriya K, Shlomchik M, Uzel G, Gray PE, Suan D, Preece K, Chua I, Okada S, Chikuma S, Kiyonari H, Tree TI, Bogunovic D, Gros P, Marr N, Speake C, Oram RA, Béziat V, Bustamante J, Abel L, Boisson B, Korganow AS, Ma CS, Johnson MB, Chamoto K, Boisson-Dupuis S, Honjo T, Casanova JL, Tangye SG.
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| Abstract |
T follicular helper (Tfh) cells abundantly express the immunoreceptor programmed cell death protein 1 (PD-1), and the impact of PD-1 deficiency on antibody (Ab)-mediated immunity in mice is associated with compromised Tfh cell functions. Here, we revisited the role of the PD-1-PD-L1 axis on Ab-mediated immunity. Individuals with inherited PD-1 or PD-L1 deficiency had fewer memory B cells and impaired Ab responses, similar to Pdcd1-/- and Cd274-/-Pdcd1lg2-/- mice. PD-1, PD-L1, or both could be detected on the surface of human naive B cells following in vitro activation. PD-1- or PD-L1-deficient B cells had reduced expression of the transcriptional regulator c-Myc and c-Myc-target genes in vivo, and PD-1 deficiency or neutralization of PD-1 or PD-L1 impeded c-Myc expression and Ab production in human B cells isolated in vitro. Furthermore, B cell-specific deletion of Pdcd1 prevented the physiological accumulation of memory B cells in mice. Thus, PD-1 shapes optimal B cell memory and Ab-mediated immunity through B cell-intrinsic and B cell-extrinsic mechanisms, suggesting that B cell dysregulation contributes to infectious and autoimmune complications following anti-PD-1-PD-L1 immunotherapy.
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